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7477928 Method and system for associating an EKG waveform with a CT image  
A method for associating EKG waveform data with computed tomography image data using a data synchronization scheme including generating the EKG waveform data using an electrocardiogram device,...
7277522 Method for focus adjustment in a CT apparatus  
In a method for non-iterative focus adjustment in a CT apparatus the position of the center ray with regard to the movement direction of the focus and the correct phase between the detector...
7263156 Method and apparatus to facilitate computerized tomography of relatively large objects  
A computerized tomography process ( 100 ) that provides, optionally, for preliminary scans ( 101 ), helically-oriented full scans ( 102 ), and/or improved resolution scans ( 103 ). In some...
7221732 Method and apparatus for producing laminography images using a fixed x-ray source  
An imaging system and method for taking an image of an object. The imaging system comprises a mechanism that propels the object linearly in a direction of motion through an imaging region that has...
7209580 Fast computed tomography method  
The invention relates to a computed tomography method for forming images of an object to be examined which is arranged in an examination zone. The examination zone is scanned by means of a conical...
7020511 Method for three dimensional cine EBA/CTA imaging  
Certain embodiments of the present invention provide a method for three-dimensional cine EBA/CTA imaging. The method includes monitoring a cardiac cycle of a patient and selecting a trigger point...
6990175 X-ray computed tomography apparatus  
An X-ray computed tomography apparatus includes a first X-ray tube configured to generate X-rays with which a subject to be examined is irradiated, a first X-ray detector configured to detect...
6272199 Computer tomography apparatus  
A CT apparatus with alternating focus, in which the detector elements deliver output data when picking up individual projections corresponding to the beam attenuation of the X-rays proceeding to...
6256369 Computerized tomography scanner with longitudinal flying focal spot  
In an improved computerized tomography scanner, the X-ray source is configured to have a focal spot that is variable in position in a direction parallel to or substantially parallel to the...
6118841 Detector array geometry for helical scanning volumetric computed tomography system  
In an improved method and apparatus for cone-beam reconstruction, an improved detector array is provided in an asymmetric shape with respect to the translation axis. In a first embodiment, a...
6038518 Error correction of system transfer function by use of input compensation  
A technique to modify the input data to any system so as to cancel errors in the transfer function of that system. The system error response to each possible input amplitude transition is...
6005908 X-ray computed tomography apparatus with radiation detector which reduces image unsharpness  
An X-ray computed tomography apparatus has a radiation detector composed of X-ray converters so that the scattering of light in a scintillator or the inductive disturbance in a directly converting...
5396528 Tomographic image reconstruction using cross-plane rays  
A CT apparatus employing a cone beam of x-rays reduces image artifacts by employing full as opposed to half scans of less than 360°. The present invention recognizes that rays of a cone beam that...
5365560 Method and apparatus for acquiring a uniform distribution of radon data sufficiently dense to constitute a complete set for exact image reconstruction of an object irradiated by a cone beam source  
A method and apparatus for acquiring scanning cone beam projection data along a three dimensional scanning trajectory is disclosed. The technique ensures acquisition of a substantially uniform...
5333164 Method and apparatus for acquiring and processing only a necessary volume of radon data consistent with the overall shape of the object for efficient three dimensional image reconstruction  
An improved method and apparatus is disclosed for retaining only necessary cone beam projection data acquired along a three dimensional scanning trajectory in order to ensure more computationally...
5311427 Method for removing artifact and for correcting sensitivity of single photon emission computerized tomography and apparatus thereof  
A single photon emission computerized tomographic (SPECT) image acquiring method in which a fan-beam collimator radiation emitted from a radio isotope (RI) supplied into a biological body under...
5307264 Method and apparatus for computing tomographic scans  
Apparatus and method for mounting on an existing x-ray simulator and calculating a back projected computed tomographic image. The detector array is linear and outputs signals from the photodiodes...
5249124 Multi-isotope imaging using energy-weighted acquisition for, e.g., myocardial perfusion studies  
A multi-isotope study is carried out using a plurality of imaging agents which are imaged simultaneously. The information obtained is weighted using as many energy weighting functions as there are...
5233518 Extrapolative reconstruction method for helical scanning  
A method of reducing image helical scanning; artifacts in computed tomography imaging systems divides 360° of projection data into two half scans. Separate weighting functions are applied to the...
5224136 Helical scanning computed tomography apparatus with constrained tracking of the x-ray source  
A CT apparatus reduces errors in projection data acquired in helical scanning. The imaged object moves concurrently along a translation axis and the x-ray beam is periodically translated with the...
5216601 Method for fan beam helical scanning using rebinning  
A method of reducing image artifacts in images acquired with fan beam, helical scanning, tomographic imaging systems rebins the fan beam data into parallel beam projection sets. Data is spliced...
5208746 Method for helical scanning with a stationary detector using rebinning and splicing to create detector vertex projection sets  
A method of reducing image helical scanning artifacts in fourth generation computed tomography imaging systems, rebins 360° of projection data into two half scans. The data of the half scans is...
5170346 Method for reducing patient translation artifacts in tomographic imaging  
A method of reducing artifacts in images acquired with fan beam, helical scanning, tomographic imaging systems, applies a weighting function to the tomographic projection set. The weighting...
5128864 Method for computing tomographic scans  
Apparatus and method for mounting on an existing x-ray simulator and calculating a back projected computed tomographic image. The detector array is linear and outputs signals from the photodiodes...
5090037 Helical scanning computed tomography with tracking x-ray source  
A CT apparatus reduces errors in projection data acquired in helical scanning. The imaged object moves concurrently along a translation axis and the x-ray beam is periodically translated with the...
5047931 Parallel computation of fan-beam back-projection reconstruction algorithm in computed tomography  
Parallel accumulation of the density functions of image picture elements is done for a number of elements located at the same radial distance from the axis of rotation for the fan-beam scanner....
5029192 Computer tomography apparatus with detector which is rotatable separately from the x-ray source  
A computer tomography apparatus has an x-ray source which emits a fan-shaped x-ray beam which irradiates a slice of an examination subject. The x-ray source is rotatable around the examination...
5027378 Industrial computed tomography apparatus  
An industrial CT apparatus capable of obtaining a good image quality by a simple configuration. The apparatus is the second generating type incorporating the rotational motions as well as the...
4984159 Method and apparatus for estimating elliptical body contours in fan beam computed tomographic systems  
A method and means is presented to estimate the contour of a body to compensate for attenuation in the production of a reconstructed image in fan beam computed tomographic systems having a detector...
4979111 CT image processor using data expansion for reducing structural noise in rearrangement  
A CT image processor for use in X-ray computerized tomographic system including an X-ray source for providing fan beams on an object being examined, a multichannel X-ray detector for detecting the...
4934832 Computer tomography apparatus with resiliently mounted radiation detector  
A computer tomograph apparatus of the type having a rotating frame which carriers an x-ray source and a radiation detector includes a mount for the radiation detector which resiliently seats the...
4914588 Computer tomography apparatus for generating an image of a portion of a sectional slice of a subject for use with a lithotripsy apparatus  
A third generation computer tomography apparatus has a radiation detector which is so narrow that the image constructed by the computer represents only a portion of a cross-sectional slice of an...
4850004 Method and system for acquiring computerized tomogram data  
In computerized tomography apparatus having a radiation source and a detector, when the radiation source and the detector are rotated in a rotational direction, acquisition of computerized tomogram...
4812983 Method and means of correcting for a shift in the center of rotation of a rotating fan beam CT system  
Method and means for determining and compensating for a shift in the center of rotation of a fan beam CT reconstruction apparatus. Known reconstruction algorithms for fan beam computed tomography...
4751644 Interleaved source fan reconstruction technique  
In a fourth generation CT scanner, source views or data sets are generated for reconstruction processing. A fan beam (16) of radiation rays is rotated around an image region (12) to irradiate...
4707822 Tomographic apparatus  
An apparatus for reconstructing a tomographic image of an object which is positioned within a scanning circle and which is scanned by a fan-shaped beam of radiation partially rotating around the...
4707786 Computer tomography system and method for operating same  
A computer tomography system has an X-ray source and a radiation receiver having an array of individual detectors each forming an electrical signal corresponding to the received radiation...
4682289 View interpolation in a tomography system using pipe line processing  
A computerized tomography apparatus comprises a source rotating about an object for directing fan-shaped beams of radiation towards the object, a detector for detecting the fan-shaped beams of...
4680709 Back projection image reconstruction apparatus and method  
Image reconstruction time in a CT scanner is enhanced by using a pipeline structure and interpolation techniques to identify each detector for use in back projection of radiation aborption...
4670892 Method and apparatus for computed tomography of portions of a body plane  
A method and apparatus for computed axial tomography (CAT) image reconstruction applicable to X-ray scanning of the human body. Successive series of calculations determine the values of a...
4669103 CT scanner with rotatable fan beam and non-rotatable detector ring  
A CT scanner has an X-ray source for producing a fan beam that is rotatable relative to the axis of the scanner in a plane perpendicular to the axis, and a plurality of X-ray detectors mounted in a...
4654797 Computer tomography system wherein preprocessing, convolution and back projection computations are performed prior to external data storage  
A radiation CT system packs projection data and reads the data in a DMA mode, and separates the packed data into individual data items through format conversion when the data are to be processed....
4636952 Method and apparatus for back projection image reconstruction using virtual equi-spaced detector array  
Image reconstruction in a tomographic scanning system using a fan beam of radiation and a curved equi-angular detector array is facilitated by mapping signals from the curved array into a virtual...
4630202 Computerized tomographic apparatus utilizing a radiation source  
In a computerized tomographic CT apparatus, X-rays penetrated from a slice of an object are computer-processed so as to reconstruct a tomographic image of the imaginary slice of the object. The CT...
4590559 Data disc system for a computed tomography X-ray scanner  
A data disc system for a computed tomography X-ray scanner employing a plurality of disc drives for writing data into and reading data from corresponding discs. The disc drives are asynchronously...
4578752 Tomodensitometer for image display in the dynamic mode  
A process for tomodensitometric image display in the dynamic mode, and a tomodensitometer utilizing the process in medical radiology. The invention relates to a process and to a tomodensitometer...
4549265 Method of and device for image reconstruction in computed tomography  
A method and device for computer tomography in which the same filtering operation can be performed for the image reconstruction, regardless of the method used to measure the measured data. Before...
4530006 Intrinsic object sensing in a digital fan beam X-ray inspection system  
The present invention provides a digital system including circuitry for imaging items passing on a conveyor belt through an X-ray fan beam. The circuitry of the present invention enables detection...
4482958 Data processing device for computed tomography system  
A data processing device applied to a computed tomography system which examines a living body utilizing radiation of X-rays is disclosed. The X-rays which have penetrated the living body are...
4462111 Apparatus and method for examining a body, particularly useful in tomography  
Apparatus for examining a body, particularly useful in tomography, for producing transverse sectional images of the body, comprises scanning means supported by a carriage coupled to its mounting...
Matches 1 - 50 out of 87 1 2 >